The pharmacological activities on water extracts of Cortex, Ramulus and Folium from the Eucommia ulmoides Oliver were studied, and the following results were observed. The vasodilative action on the rabbit ear blood vessel was recognized in the Cortex, Ramulus and Folium. The spontaneous motility and the contraction induced by Ach., $BaCl_2$ and histamine in the isolated ileum of mice were suppressed and inhibited in the Ramulus only. On the contrary, the analgesic and anti-inflammatory activities were noted in the Cortex and Folium. Furthermore, the hypotensive effect was recognized in the Folium. The diuretic, bile secretory and anti-fatigue effects were shown in the Cortex and Folium.